Photographic enlargement apparatus



Sept. 22, 1936. w. KLATT PHOTOGRAPHIC ENLARGE MENT APPARATUS OriginalFiled July 29, 1933 ATTORNEY on the objective setting not starts cremeacetate rneroenarmo aura aa'rns Waiter Klatt, lienerbach,

near Stuttgart, Gem

' many, assignor to Ernst helm @ptische Werhe,

Wetsiar, Germany @riginal application July 29, 1933, serial Ne.

6825384). Eiivided and this application Febrn my 1?, 1934, SerialNan-711,696!

' l. Claim. (Cl. $S-2ii This invention relates to improvements inphotographic enlargement apparatus, as for instance described in myco-pending application Serial No. 682,780, filed July 29, 1933, of which5 this application is a division, and it is the principal object of myinvention to provide such an apparatus with a cam controlled automaticregulation of the objective to the sharpest iocus.

The object or; the present invention is to pro- W vide an enlargementcamera for small negatives with means for automatically focusing thecamera objective, including a system of levers pivotalh connected to theobjective setting'while aroller displaceable relatively to said settingand 35 a cam operating by alever arm of said system operates the rollerto locus the objective.

These and other objects and advantages of my invention will become morefullylrnown as the description thereof proceeds, and will then be 20more specifically defined in the appended claim.

in the accompanying drawing forming a material part of this disclosure:

The single figure on the drawing illustrates in side elevation thepreferred form of my appat6 ratus constructed according to my invention.

As illustrated, the enlargement apparatus is arranged on a stationaryarm 7 vertically displaceable on standard a and can be locked in any atits adjusted positions by means or the lacking device 3. The swingingarm 52 is adjustarranged in a guide is suitably, held to the end or anattached to the upperend of standard a and can be rotated therein; andmoves the cam 57 engaging roller 1 or another projection of well knownconstruction and telescoping. withhouslng e, so that the objectiveconnected therewith is suitably adjusted as the roller i or etherprojection of the objective setting is verti- 49 calls dispiaceable in aslot 10 in housing e illustrated as it isthrough which the shaft ofroller i projects.

the objective.

The lower end ofarm b is pivoted, as at Z similar to the arrangement inthe lever arm parallelogram b and c of Figures 1 and 2, or my oo-pendingapplication, pivoted at o and p respectively to standard a. The baseboard 2? is used as support for the sensitive paper and the slot 2serves for the introduction of the negative into the enlargementapparatus below the lamp casing,

In operation, the cam g under the influence of the movement 01'' thelever arms h and i will en- I gage the roller 1, the spindle pin ofwhich is guided in the slot n of the objective setting to focus the samefor the correct enlargement of a small film negative on a supportaccording to the angular positions of the lever arm aggregate.

It will be understood that l. have described and shown the preferredform of my invention as one example of the many possible ways topractically construct my invention, and that I may make such changes inthe general arrangement and in the construction of the minor details of.my invention as come within the scope 'of the appended claim withoutdeparture from the spirit of my invention and the principles involved.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is:

In an enlargement camera for small negatives,

a. means for automatically focusing the camera objective, said-meanscomprising a standard, a

rigid arm vertically adjustable on said standard,

anarm on said standard carrying a guide, a lever arm displaceably androtatably held in said guide, and pivotally connected to the slottedhousing of the 'objectivesetting, a roller on a spindle displaceablerelatively to said setting projecting through the slot in said housingand a cam onerated by said lever to operate said roller to focus WALTER

